Typical behavior by band
Use this guide to compare common band behavior by time of day and season. Actual openings depend on location, path, solar and geomagnetic conditions, noise, antennas, and other station factors.
Quick band-selection matrix
Typical starting points
Choose a time, season, and goal to highlight typical bands to check first.
Band-by-band reference
160m 1.800–2.000 MHz · HF
Night-focused regional and DX band.
Primary window: Sunset through sunrise
- Solar dependence
- Fair - Often useful without strong solar support.
- Typical range
- Regional to worldwide DX
- Regional
- Supports regional nets after dark.
- DX
- Can favor long paths at night.
- Gray line
- Sunrise and sunset can enhance DX.
- Noise
- Often noisy, especially in summer.
Tip: Listen near sunset before chasing higher bands.
Watch for: Noise and crowded evening segments.
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80m 3.500–4.000 MHz · HF
Reliable nighttime regional and DX band.
Primary window: Late afternoon through sunrise
- Solar dependence
- Fair - Less dependent on high solar activity.
- Typical range
- Regional to worldwide DX
- Regional
- Often strong for evening nets and nearby paths.
- DX
- Improves after sunset for longer paths.
- Gray line
- Worth checking at both transitions.
- Noise
- Atmospheric noise can be significant.
Tip: Use it for regional work when higher bands fade.
Watch for: Summer static and local noise.
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60m 5.3305–5.4065 MHz · HF
Regional band often useful from sunrise through the night.
Primary window: Sunrise through overnight
- Solar dependence
- Fair - Usually less solar-sensitive than upper HF.
- Typical range
- Regional to medium-distance
- Regional
- Often useful for regional nets and NVIS-style paths.
- DX
- Longer paths can appear around transitions.
- Gray line
- Transition periods are worth testing.
- Noise
- Usually quieter than 80m, but site dependent.
Tip: Use it when lower-band regional coverage is useful but 80m is noisy.
Watch for: Channelized restrictions; see the US Band Plan.
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40m 7.000–7.300 MHz · HF
Versatile regional-by-day, DX-by-night band.
Primary window: Daylight through overnight
- Solar dependence
- Fair - Works well across many solar conditions.
- Typical range
- Regional to worldwide DX
- Regional
- Useful for daytime regional and net work.
- DX
- Often strengthens from evening through dawn.
- Gray line
- A frequent time for enhanced DX.
- Noise
- Can be noisy at night and in summer.
Tip: Start here when deciding between regional and DX work.
Watch for: Crowded evening phone segments.
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30m 10.100–10.150 MHz · HF
Steady DX band for narrow modes.
Primary window: Daylight through evening
- Solar dependence
- Good - Benefits from supportive ionospheric conditions.
- Typical range
- Regional to worldwide DX
- Regional
- Can cover medium-distance paths well.
- DX
- Often productive for worldwide narrow-mode DX.
- Gray line
- Often worth an early transition check.
- Noise
- Usually quieter than lower bands.
Tip: Use it when 20m is marginal and voice is not needed.
Watch for: No phone operation and limited bandwidth.
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20m 14.000–14.350 MHz · HF
Dependable daytime DX with year-round availability.
Primary window: Daytime through early evening
- Solar dependence
- Good - Benefits from stronger solar support.
- Typical range
- Regional to worldwide DX
- Regional
- Nearby contacts may be difficult at midday.
- DX
- A primary daytime worldwide DX band.
- Gray line
- Can stay open around sunset.
- Noise
- Generally quieter than lower HF bands.
Tip: Start here in daylight, then check higher bands.
Watch for: The band can close quickly after sunset.
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17m 18.068–18.168 MHz · HF
Daytime DX band with less crowding.
Primary window: Mid-morning through late afternoon
- Solar dependence
- Good - Needs supportive upper-HF conditions.
- Typical range
- Regional to worldwide DX
- Regional
- Favors longer regional paths over nearby work.
- DX
- Often a clean alternative to 20m.
- Gray line
- Can extend useful openings near sunset.
- Noise
- Usually quiet when open.
Tip: Check it when 20m is busy or crowded.
Watch for: Openings can be selective and brief.
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15m 21.000–21.450 MHz · HF
Strong daytime DX when upper HF is supported.
Primary window: Late morning through afternoon
- Solar dependence
- Excellent - Responds strongly to solar support.
- Typical range
- Regional to worldwide DX
- Regional
- Often favors longer paths over close contacts.
- DX
- Can deliver excellent daytime worldwide DX.
- Gray line
- May hold briefly near transitions.
- Noise
- Usually quiet when the band is open.
Tip: Try it after 20m when conditions improve.
Watch for: Quiet solar conditions can limit openings.
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12m 24.890–24.990 MHz · HF
More dependable than 10m, with selective daytime DX.
Primary window: Late morning through afternoon
- Solar dependence
- Excellent - Needs favorable upper-HF support.
- Typical range
- Regional to worldwide DX
- Regional
- Usually not a close-in band.
- DX
- Can offer less-crowded worldwide DX.
- Gray line
- Transitions can stretch short openings.
- Noise
- Usually quiet when open.
Tip: Check it after 15m; it may remain usable when 10m does not.
Watch for: Openings may appear and fade quickly.
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10m 28.000–29.700 MHz · HF
Highly variable band with exceptional openings.
Primary window: Late morning through afternoon
- Solar dependence
- Excellent - Strong solar support improves F-layer DX.
- Typical range
- Local to worldwide DX
- Regional
- Can support short skip and regional contacts.
- DX
- Can become an exceptional DX band when open.
- Gray line
- Transitions can reveal brief DX paths.
- Noise
- Usually quiet, but openings are uneven.
Tip: Check it often instead of assuming it is closed.
Watch for: Rapidly changing and selective conditions.
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6m 50.000–54.000 MHz · VHF
Seasonal, highly variable band with sporadic-E.
Primary window: Daylight and seasonal openings
- Solar dependence
- Variable - Not solely driven by solar flux; sporadic-E matters.
- Typical range
- Local to long-distance during openings
- Regional
- Local FM and line-of-sight use remain dependable.
- DX
- Sporadic-E and other modes can create long paths.
- Gray line
- Can be worth checking, but not a primary driver.
- Noise
- Usually quiet outside local activity.
Tip: Monitor beacons and calling activity during seasonal openings.
Watch for: Sporadic-E, tropo, and rapidly changing paths.
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Practical decision guide
- Daytime DX
- Start around 20m, then check 17m, 15m, 12m, and 10m as conditions allow.
- Evening DX
- Try 40m first; compare 20m near sunset and 80m after darkness.
- Overnight operating
- Begin with 40m, 80m, or 160m according to noise and path.
- Regional contacts
- 40m and 80m are common starting points; 60m can be useful where permitted.
- Weak or uncertain conditions
- Start lower, listen, and move upward only when the path supports it.
- Gray-line opportunities
- Check 160m, 80m, 40m, and 20m around sunrise or sunset.
Use with Ham Deck tools
- Full Propagation View - check conditions now.
- HF Propagation Predictor - plan a future operating window.
- Solar Conditions - review current solar data.
- MUF and LUF Explained - understand usable-frequency limits.